Accounting Policies and Related Matters - Additional Information (Details)	8 Months Ended	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2016 USD ($) Segment	Dec. 31, 2015 USD ($)
Accounting Policies And Related Matters [Line Items]
Number of reportable segments | Segment		1
Restricted cash balance		$ 300,000	$ 100,000
Allowance for doubtful accounts		0	0
Operating expense recoveries	$ 200,000
Allowance for loan losses		0	0
Intangible lease assets		11,387,000	3,441,000
Real Estate
Accounting Policies And Related Matters [Line Items]
Intangible lease assets		11,387,000	3,441,000
Above Market Leases | Real Estate
Accounting Policies And Related Matters [Line Items]
Intangible lease assets		7,636,000
Medical Office Building
Accounting Policies And Related Matters [Line Items]
Operating expense recoveries		$ 900,000	$ 800,000